I’m glad I got the AMS with my P1S too, not just for the automatic loading and changing of filament but also what that means for supports as after doing a few prints with and without using the Support filament the printer comes with for the interface between supports and the printed object I’m going to be using that more as I just had one print where I couldn’t get all of the support off using the same filament as the build and had to file it down to fit something in it.
I didn’t use it for this print as it would have made the print take a lot longer as it was a curved overhang, then did a another print with the Support filament as interface and it’s just so nice how it comes off, lesson learnt, sometimes it’s worth the wait.
As for wasted filament, how else are you to do multi-filament prints, unless your printer has multiple extruders that’s unavoidable, and there are multiple ways to reduce that or use it to make something else.
As for P1S vs X1C, from a lot of the comparisons and suggestions online the lidar and better camera, etc just isn’t worth it for the vast majority of people, the lidar doesn’t even always work and when it does the differences it makes are tiny, and yes the touch screen is nice, but you are not really going to be using it much. It’s setting up the print at a computer to make sure all the settings are as you want them and then sending it to the printer, and then using the mobile app maybe which can do what that screen does, so I don’t use the screen. It’s just not worth it the big jump in price.